4. Assume there are three processes A, B and C. All processes are submitted for execution at the same time. The process A executes for 2 milliseconds and then does I/O for 3 milliseconds and then executes for 3 milliseconds more. The process B executes for 4 milliseconds and then does I/O for 7 milliseconds. The process C executes for 2 millisecond and then does 1/O for 4 milliseconds. Assume no contention for the resources and the order of execution (priority) is A, B and C. a) Calculate the processor utilization without multiprogramming. b) Calculate the processor utilization with multiprogramming. c) Assume that the computer system has 512 Mbytes of available memory. What is the memory utilization with multiprogramming if Process A requires 256 Mbytes, Process B requires 128 Mbytes and Process C requires 64 Mbytes of memory. Note that: all processes are submitted for execution at the same time. d) What would be the total job duration, if these processes were executed on a multi-processor system with two processors?
4. Assume there are three processes A, B and C. All processes are submitted for execution at the same time. The process A executes for 2 milliseconds and then does I/O for 3 milliseconds and then executes for 3 milliseconds more. The process B executes for 4 milliseconds and then does I/O for 7 milliseconds. The process C executes for 2 millisecond and then does 1/O for 4 milliseconds. Assume no contention for the resources and the order of execution (priority) is A, B and C. a) Calculate the processor utilization without multiprogramming. b) Calculate the processor utilization with multiprogramming. c) Assume that the computer system has 512 Mbytes of available memory. What is the memory utilization with multiprogramming if Process A requires 256 Mbytes, Process B requires 128 Mbytes and Process C requires 64 Mbytes of memory. Note that: all processes are submitted for execution at the same time. d) What would be the total job duration, if these processes were executed on a multi-processor system with two processors?
Operations Research : Applications and Algorithms
4th Edition
ISBN:9780534380588
Author:Wayne L. Winston
Publisher:Wayne L. Winston
Chapter20: Queuing Theory
Section20.10: Exponential Queues In Series And Open Queuing Networks
Problem 11P
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